PLLA threads, or poly-L-lactic acid threads, are extensively utilized in medical applications, including sutures, soft tissue implants, and dermal fillers (such as Sculptra). These biocompatible and biodegradable sutures offer a long-lasting lift by stimulating collagen production and improving skin elasticity. PLLA threads are known for their ability to produce natural-looking results that can last up to two years.
Their slower absorption rate contributes to more durable results.
Mechanism of Action
PLLA threads provide a dual effect:
- Instant Lift: Upon insertion, the threads create a scaffolding structure under the skin, offering immediate mechanical support and a subtle lifting effect.
- Collagen Stimulation: Over the next few months, the PLLA material slowly degrades while stimulating fibroblasts to produce new collagen, which enhances skin texture, elasticity, and firmness.
PLLA threads work by gradually stimulating the body’s collagen production, leading to a more gradual and natural improvement in the skin’s texture and firmness. Over time, the threads are absorbed by the body, leaving behind a rejuvenated appearance.
Duration Of Action
One of the most significant advantages of PLLA threads is their long-lasting collagen induction. Though the threads themselves dissolve (typically within 12 to 18 months), the newly formed collagen can sustain skin firmness and rejuvenation for up to two years.
Aesthetic Application of PLLA Threads
Skin Texture Improvement:
Fine PLLA threads smooth crepey or rough skin, especially on the cheeks, neck, and jawline, resulting in softer, more refined skin texture.
Volume Restoration:
In areas with fat loss such as temples, nasolabial folds, and under the eyes, PLLA threads help restore volume gradually, giving a fuller, youthful appearance.
Wrinkle Reduction:
They effectively reduce fine lines on the face, neck, décolleté, and hands, leading to smoother, younger-looking skin.
Skin Tightening:
By stimulating collagen, PLLA threads improve skin elasticity and firmness without mechanical lifting.
Deep Nasolabial Folds:
They help soften pronounced smile lines, restoring smoothness to the midface.
Marionette Lines:
PLLA threads reduce sagging around the mouth and jawline, enhancing facial youthfulness.
Midface Volume Loss:
They restore cheek volume and improve facial contours naturally over time.
Jawline Contouring:
Gradually define the jawline, creating a more sculpted lower face profile.
Benefits of PLLA Threads
Collagen Stimulation: One of the most significant benefits of PLLA threads is their ability to stimulate collagen production over time. This natural process leads to a gradual improvement in skin texture and elasticity.
Long-lasting Results: PLLA threads are designed to have a long-lasting effect, often up to 18-24 months. The slow absorption of the threads allows for extended facial lifting and rejuvenation.
Biocompatibility: Being biocompatible, PLLA threads pose a lower risk of adverse reactions and are safe for patients with various skin types and sensitivities.
Natural Appearance: The results from PLLA threads tend to look very natural, as they cause gradual improvements rather than drastic changes, making them a popular choice for those seeking subtle enhancements.
How PLLA Threads Work
- Insertion: PLLA threads are inserted into the skin using a fine needle or cannula.
- Lifting: The threads are gently pulled to lift and reposition sagging skin tissue.
- Collagen stimulation: As the threads dissolve, they stimulate the body to produce collagen, leading to improved skin elasticity and texture.
- Gradual improvement: The effects of PLLA threads become more noticeable over several weeks as the collagen production increases.
Ideal Candidate
- Individuals with mild to moderate skin laxity
- Those seeking preventive anti-aging treatments
- Patients who want to avoid drastic changes
- People with thinning or crepey skin texture
Possible Side Effects
- Mild pain or discomfort
- Bruising or swelling
- Asymmetry
- Infection (very rare)
- Temporary dimpling or puckering
Patient selection and proper technique are crucial to minimize risks and achieve optimal outcomes.
Limitations and Considerations
- Delayed results – PLLA threads require time for results to appear (usually 6–12 weeks post-treatment), making them unsuitable for immediate gratification. Also, results are cumulative and best seen with repeated sessions or combined protocols, such as PRP, mesotherapy, or skin boosters.
- Higher cost – More expensive than PDO threads
Conclusion
PLLA threads represent a powerful tool in non-surgical facial rejuvenation. By combining immediate mechanical lift with long-term collagen production, they offer a unique blend of instant and progressive results. When administered by a qualified aesthetic professional, PLLA threads can help patients achieve a youthful, refreshed appearance without the need for invasive surgery.
FREQUENTLY ASKED QUESTIONS
Q. What are PLLA threads made of?
PLLA threads are made from Poly-L-Lactic Acid, a synthetic, biodegradable polymer derived from lactic acid. It is biocompatible and has been safely used in medical sutures and injectable fillers.
Q. Are PLLA threads lifting threads?
No. PLLA threads are non-barbed and are not designed for mechanical lifting. They are biostimulatory threads, used primarily to stimulate collagen production and improve skin quality over time.
Q. How long do PLLA threads last in the skin?
The threads typically dissolve over 6 to 8 months, but their collagen-stimulating effect can last up to 18 to 24 months, depending on skin condition and metabolism. Q. What forms do PLLA threads come in?
PLLA threads are available in several forms:
- Monofilament (smooth)
- Spiral or screw-shaped
- Braided or mesh configurations
Each type is suited to specific aesthetic indications such as collagen stimulation, dermal thickening, or skin texture improvement.
Q. What are the key properties of PLLA thread?
- Biodegradable and biocompatible
- Slow-degrading (longer-lasting effects)
- Non-inflammatory
- Collagen-stimulating
- Stable under sterile packaging conditions Q. What is the shelf life of PLLA threads?
Most PLLA threads have a shelf life of 2 to 3 years, depending on the manufacturer. They should be stored in cool, dry, sterile conditions and used before the expiry date. Q. Can PLLA threads be combined with other thread types?
Yes. PLLA threads are often combined with PDO or PCL threads to achieve layered effects such as lift from PDO and long-term regeneration from PLLA. Q. What makes PLLA threads different from PDO threads?
PLLA threads offer:
- Longer-lasting collagen stimulation
- Slower absorption rate
- Stronger bio stimulatory effect
Whereas PDO threads are absorbed faster and typically used for short-term effects or mechanical lifting.
Q. Do PLLA threads leave residue in the skin?
No. PLLA threads fully degrade leaving no residue behind. The collagen they induce remains as the lasting benefit.
References
1.PLLA Threads: A Long-Lasting Solution for Thread Lifts. (2025). Internal report, ZEVANEX PHARMACEUTICAL13 PLLA THREADS & FAQ
3.Wong, C. H., & Mendelson, B. (2019). Long-lasting facial rejuvenation with absorbable suture lifting: Indications and outcomes of PLLA threads. Aesthetic Plastic Surgery, 43(6), 1502–1512.
4.Wu, W. T. (2019). Barbed and non-barbed threads in aesthetic lifting: Mechanisms and techniques. Aesthetic Surgery Journal, 39(2), 205–218.
5.Gentile, P., Calabrese, C., De Angelis, B., & Cervelli, V. (2017). Biostimulatory properties of poly-L-lactic acid in aesthetic medicine: Clinical applications. Journal of Plastic, Reconstructive & Aesthetic Surgery, 70(2), 157–165.
6.Lee, Y. B., Kim, J. S., & Cho, H. R. (2020). Comparative outcomes of PLLA, PDO, and PCL threads in facial rejuvenation. Journal of Cosmetic Dermatology, 19(8), 1948–1955.
7.Shin, J. Y., & Kim, Y. J. (2018). Long-term effects of poly-L-lactic acid threads in collagen stimulation and skin tightening. Dermatologic Surgery, 44(9), 1206–1214.
8.Villa, D., & Trelles, M. A. (2021). Non-surgical thread lifting: Advances in materials and clinical outcomes. Clinical, Cosmetic and Investigational Dermatology, 14, 133–142.
